FMST · Foremost Clean Energy Ltd.

This 6-K filing delivers a HIGH-materiality exploration update confirming material advancement of Foremost’s flagship Tuning Fork Uranium Zone at Hatchet Lake South — a core value driver for the company. The 2026 drill program successfully extended known mineralization northward by ~100 metres via TF-26-36 and delivered its strongest grade-to-date (1.0% eU₃O₈ over 1.4m) in TF-26-30, reinforcing both grade potential and structural continuity along the conductive corridor. Critically, six holes across four drill fences intersected mineralization above the 0.05% cut-off, indicating broad zone development rather than isolated hits. The disclosure that ~600 metres of conductive strike length remains sparsely tested to the south is not merely incremental — it defines a large, geophysically supported, discovery-ready target immediately adjacent to current mineralization, significantly de-risking near-term exploration upside. Management’s pivot to commence drilling at Richardson SE on Hatchet Lake North — targeting >5 km of untested conductor with integrated geophysical evidence of structure and alteration — signals disciplined capital allocation across a portfolio of high-potential, data-validated targets. The program’s foundation in Denison’s historical data and geological interpretation further strengthens technical credibility. For investors, this represents tangible progress toward resource definition and discovery scaling, directly supporting Foremost’s strategic thesis of leveraging legacy data to accelerate uranium exploration in the Athabasca Basin.